Topic: Metadata

Description

Metadata is "data about data".
Metadata provides information about a certain item's content.
It describes when, how, and by whom a certain set of data was formatted and collected.
Metadata is an essential component of the collection of storage in databases and data warehouses.
- Example:
  - An image on a webpage may contain metadata describing how large it is, the image resolution, when the image was taken, and much more.

Types of Meta Data

Technical metadata data structures such as: tables, fields, data types, indexes.

Business metadata what data you have. where it came from how it relates to the tables.

Process metadata describes operations in data warehouse. start time, end time, CPU seconds used, disk reads, disk writes and rows processed. Valuable to companies.

Purpose

Google uses Metadata to return searches that compile:
- Keyword text
- Data embedded into the head of an HTML sheet
  - ex:<head>
    <meta name="description" content="LIS3353 Assignment 5">
    <meta name="keywords" content="metadata, group project, ">
    <meta name="author" content="Kristina Wong, Justin Cordila, Christopher Butler, Troy Capaso, & Mario Corea">
    </head>
- Hastags from Twitter & other Social Media
How to use metadata
- Tag your tweets, post, & shares with relevant tags
- Use between 80-120 characters for description, alt, title and other HTML tag attributes to add metadata that search engines can respond to
- Use databases to search for specific criteria efficiently